M. Rodriguezbaeza et al., SYNTHESIS AND STRUCTURE OF CROSS-LINKED POLY[(METHYLSILOXANE)-CO-(OXYMETHYLENE)] COPOLYMERS, Macromolecular rapid communications, 18(8), 1997, pp. 747-754
A series of new crosslinked copolymers was obtained by cationic ring-o
pening copolymerization of 1,3,5,7-tetramethylcpclotetrasiloxane and 1
,3,5-trioxane. Theqoly[(methylsiloxane)-co-(oxyme thylene)] copolymers
are white crystals or glassy. Crosslinking reactions take place in th
e reaction medium. The degree of crosslinking increases with a higher
concentration of the methylsiloxane units in the copolymers. The combi
nation of solid-state magic-angle spinning nuclear magnetic resonance
of Si-29 and C-13 and Fourier-transform infrared spectroscopy provided
a quantitative description of the copolymer microstructure.